Machine for reducing and cutting dye woods and bark



A. McMILLEN.

Bark Mill.

Patented Dec. 26, 1837.

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UNITED STATES PATENT OFFICE.

ABNER MOMILLEN, OF BEDFORD, NEW HAMPSHIRE.

MACHINE FOB. REDUCING AND CUTTING DYE TOODS AND BARK.

Specification of Letters Patent No. 582, dated December 26, 1837.

T0 all whom t may concern Be it known that I, ABNER MCMILLEN, ofBedford, in the county of Hillsborough and State of New Hampshire, haveinvented,

made, and applied to use new and useful Improvements in Machinery forReducing Dye Voods and Bark to a Proper State for the Extraction ofColoring or Tannin.

The disposition, arrangement, and use of the several parts of theseimprovements, the principle thereof, and several modes in which I havecontemplated the application of that principle or character by which itmay be distinguished from other inventions and discoveries, I have fullyset fort-h and described in the following specification, and annexeddrawings.

A strong frame of wood or metal, A A A, is constructed as represented inFigures l and 2, or o-therwise shaped and formed for the intendedpurpose of supporting the remaining parts of the machinery. On the topof this frame is placed a cross shaft B, with suitable bearings a, a,near each extremity. On one end of the shaft B is placed a drivingpulley b, on which the belt is wound., which operates the machine. Anumber of circular plates of metal c, c, c, are confined on the shaft B,by a nut fl, acting against a shoulder e, or in any other convenientmanner. At suitable points in the circumferences of these plates,the-cutters f, f, g, g, are fixed by dovetailed projections as seen at71 entering into corresponding notches in the edges of the plates; orthey may be otherwise attached in any proper manner. As each cutter isplaced a certain distance back of the other, the whole together takespiral directions around the circumference of the cylinder of plates,and by this order of construction each cutter is caused to operate onthe wood before the next succeeding one, each row cutting from thecircumference of the block or log toward the center.

The shape of the cutters is denoted in Figs. l and 2, the cutting edgesbeing beveled or inclined each way from the center of the cylinder, inorder that the particles cut may be thrown out and not clog` togetherand 0 thereby impede the action of the machine. C G is the platform forsustaining the log or p iece of wood to be cut. One end of the log isgripped and held fast in the metallic frame D D. This frame may beformed as represented in the drawing, o-r in any other convenientmanner. As therein constructed, it consists of a rectangular frame 7i hsupporting the gripper z' which turns at one end by a joint Ze and hasteeth filed at its other extremity, to hold the wood firmly when placedbetween them and teeth formed o-n the edge l Z of the frame D. A Vscrewm serves to press downward the gripper i on the stick. The frame D issupported on two horizont-al racks n, a moving in suitable guidesattached to the framework A A. These racks are connected to, and areopereoy ated by pinio-ns 0, turned by a crank p, or 5 (the lever G) isaffixed one o-f the connecting i rods K,which supports one end of theroller E; and the other connect-ing rod Ii is affixed to a lever I onthe other end of the shaft H. l

I am aware that dye woods have been reduced by circular saws and othermachinery operating on the end of the sticks applied in various ways;but

What I claim as my invention, and consider as new in the above describedmachinery is as follows.

The construction of the carriage in combination with a cylinder ofcutters, and a depressing roller, constructed and operatingsubstantially as herein described.

In testimony that the above is a true specification of my saidinventions and improve ments, I have hereunto set my hand this twentyfirst day of March in the year of our Lord eighteen hundred and thirtyseven.

v ABNER MCMILLEN, L. s]

Vitnesses:

R. H. EDDY, Ezra LlNooLN, J r,

